6843661 has 4 divisors (see below), whose sum is σ = 7465824. Its totient is φ = 6221500.

The previous prime is 6843643. The next prime is 6843671. The reversal of 6843661 is 1663486.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6843661 - 2¹⁵ = 6810893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6843671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 311065 + ... + 311086.

It is an arithmetic number, because the mean of its divisors is an integer number (1866456).

Almost surely, 2^6843661 is an apocalyptic number.

It is an amenable number.

6843661 is a deficient number, since it is larger than the sum of its proper divisors (622163).

6843661 is a wasteful number, since it uses less digits than its factorization.

6843661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622162.

The product of its digits is 20736, while the sum is 34.

The square root of 6843661 is about 2616.0391816638. The cubic root of 6843661 is about 189.8582599391.

The spelling of 6843661 in words is "six million, eight hundred forty-three thousand, six hundred sixty-one".